How to change routerLink in Angular and TypeScript

Question

I have some menus in the header. Now I want to add query string parameters to all header menus programmatically. My code is like this.

<nav class="menu-links">
    <ul class="postlogin">        
        <li><a routerLink="/passenger/home" routerLinkActive="active">Home</a></li>
        <li><a routerLink="/passenger/myride" routerLinkActive="active">My Ride</a></li>
        <li><a routerLink="/passenger/profile" routerLinkActive="active">Profile</a></li>       
    </ul> </nav>

My final code will be like this:

<nav class="menu-links">
        <ul class="postlogin">        
            <li><a routerLink="/passenger/home?pi=160016" routerLinkActive="active">Home</a></li>
            <li><a routerLink="/passenger/myride?pi=160016" routerLinkActive="active">My Ride</a></li>
            <li><a routerLink="/passenger/profile?pi=160016" routerLinkActive="active">Profile</a></li>       
        </ul> </nav>

I want to do this from ngOnInit method of a page.

ngOnInit(): void {
    //add query string to all the header menu
}

I am using Angular 13, and typescript.

I did that in a jQuery project like this:

 $('a[class="aff-menu-item"]').each(function () {
        var oldUrl = $(this).attr("href");
        var newUrl = oldUrl + "?pi=160016";
        $(this).attr("href", newUrl);
    });

Answer 1

You can transfer parameter from child component to parent component or you can transfer parameter from parent component to child component.

Best way is crate a service and transfer parameter by using this service.

Service code:

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class QueryStringService {

  constructor() { }

  message: string = "";

  setQueryString(data) {
    this.message = data;
  }

  getQueryString() {
    return this.message;
  }
}

Child component code:

ngOnInit(): void {    
    this.queryStringService.setQueryString(Id);
    
  }

Menu component code:

queryString: string = "";
  constructor(
    private queryStringService: QueryStringService
  ) { }

  ngOnInit(): void {
    this.queryString = this.queryStringService.getQueryString();    
  }


 <li><a routerLink="/passenger/home" [queryParams]="{pi
                                        :queryString }" routerLinkActive="active">Home</a></li>
        <li><a routerLink="/passenger/myride" [queryParams]="{pi
                                        :queryString }" routerLinkActive="active">My Ride</a>
        </li>
        <li><a routerLink="/passenger/profile" [queryParams]="{pi
                                        :queryString }" routerLinkActive="active">Profile</a></li>